The text in the documentation suggests that we can use the attribute throttle_classes=[UserRateThrottle] In the decorator @action, however, this does not seem to be true. Because the action decorator does not recognize the throttle_classes.

I tested countless ways until I came to this conclusion.

https://www.django-rest-framework.org/api-guide/throttling/

It's also possible to set throttle classes for routes that are created using the @action decorator. Throttle classes set in this way will override any viewset level class settings.

@action(detail=True, methods=["post"], throttle_classes=[UserRateThrottle])
def example_adhoc_method(request, pk=None):
 content = {
 'status': 'request was permitted'
 }
 return Response(content)